Posted: 29/06/2015 at 17:37
I dont grow surfinias now but when I did in mid summee they looked decidedly poorly. In my case it was aphids. You domt necessarily see them. I trimmed them back...as I tend to do with "perpetual" flowering plants.....to set them off again until autumn. A spray worked for me. Perhaps you are over watering...you seem to,think you are...but in my book, esp if youre enjoying a decent summer, you cant over water hanging baskets.
however, I'm sure there will be some other answers Mumoftwo